You can get a new doll that adds new 3 craftable mythic weapons, which are some of the strongest in the game, and don't kill your reason.Well all 3 craftable mythic weapons kills your reason. So does the first ~4 mythic weapons found in dungeon. So they really don't want to give you anything good for a spell blade.
Seems like Spellblade gets better in late game, but I didn't play this class yet so I'm not sure.